If she's been living there during the foreclosure and not paying rent, then she what did she do with the money she would have used to pay rent? 

This is what got Dave Ramsey in trouble years ago and that's why he preaches financial advice the way he does.Back to the original topic.

For example, my appliance store gives me a 10% discount, so I charge a 5% markup to my owners to make a little money and the owner still saves 5% from retail. 

Slowly and surely, you will make a lot money.

The deal has to make sense and you really need to know the comps to make sure your investment is going to actually make money.

put another way:-Go on Zillow and buy a random property in Detroit: fail, lose money, give up on real estate investing.

But it also is a money pit if you don’t have the experience.  

But if I sell it and put that money in the stock market and earn let’s say 8% I would make $40,000 on the same money.  

But you have the option to just pay the monthly payment up to maturity in case something goes wrong or if you decide you can use that money better to just build another property instead of paying it off. 

There is almost no scenario where a condo would ever positive cash flow while servicing debt, and very little positive cash flow with no debt.If your budget only allows for a condo, find a better place to put your money to work.